This article provides a brief introduction to the ongoing controversy concerning right-to-work (RTW) legislation in the United States. The paper proceeds with the outlining of the major ideological arguments in favor of and in opposition to RTW laws before presenting the taste, free rider and bargaining power hypotheses which has motivated research concerning the economic effects of RTW laws. After reporting the findings of some of the basic empirical research designed to test these hypotheses as well as other recent studies, the article concludes that RTW laws have, at a minimum, moderately reduced the scope of unionization as well as the number of union members over the longrun. This indicates that the presence or absence of RTW legislation is not merely a symbolic fight as some have maintained but is something that has real consequences for the trade union movement's future in the United States in the early 21 st century.